$\"\"$

Observe the table :

The line passing through the points $\"\"$ and $\"\"$ .

$\"\"$ .

$\"\"$ (Formula for slope)

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Cancel common terms)

$\"\"$

Therefore, the slope is $\"\"$ .

$\"\"$

The slope is $\"\"$ .